Which of these descriptions captures the best practice for writing effective headlines and descriptions for app campaigns?

Headlines should focus on highlighting the key features of the app and description lines should aim to educate and inform.
Headlines should grab users’ attention and description lines should highlight the key features of the app.
Headlines should state only the name of the app and description lines should aim to educate and inform.
Headllines should include a call-to-action and description lines should include statistics about the app’s popularity.